ants.util
Class MD5

java.lang.Object
  |
  +--ants.util.MD5

public final class MD5

extends java.lang.Object

Implementation of RSA's MD5 hash generator

This code is loosely based on the RSA reference implementation and an early Java port of it by Santeri Paavolainen.

Objects of this class are single use only -- clients must ensure that only one hash is computed, and sequentially too. Hashes are returned as an array of 16 bytes.

Usage:

   byte[] hash = MD5.hash(bytes);   // single pass mode
 

or

   MD5 digest = new MD5();          // multiple pass mode
   digest.update(bytes);
   digest.update(morebytes);
   byte[] hash = digest.hash();
 

XXX Optimizations: combine all of the arrays into a single array and use fixed offsets.

Author:

David Wetherall

Constructor Summary

MD5()

Method Summary

byte[]	hash()
static byte[]	hash(byte[] buf)
static byte[]	hash(byte[] buf, int off, int len)
static java.lang.String	toShortString(byte[] hash)
static java.lang.String	toString(byte[] hash)
void	update(byte[] buf)
void	update(byte[] buf, int offset, int length)
void	update(java.lang.String s)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MD5

public MD5()

Method Detail

update

public void update(byte[] buf,
                   int offset,
                   int length)

update

public void update(byte[] buf)

update

public void update(java.lang.String s)

hash

public byte[] hash()

hash

public static byte[] hash(byte[] buf,
                          int off,
                          int len)

hash

public static byte[] hash(byte[] buf)

toString

public static java.lang.String toString(byte[] hash)

toShortString

public static java.lang.String toShortString(byte[] hash)